prov:value
| - A peptide according to claim 2 which comprises an amino acid motif of the formula R1???X???F???X???R2???R3???W???X???X???R4 (I) wherein R1 and is a proline (P), leucine (L), glutamic acid (E), cysteine (C) or glutamine (Q), X stands for one (any) natural amino acid, R2 is arginine (R), histidine (H), glutamic acid, cysteine, serine, or preferably aspartic acid (D), R3 is histidine (H), phenylalani
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